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Sinclair Enterprise
Sincalir Enterprise calculator

Sinclair Enterprise.

Display is 8 digits, red LED.

4 functions, %, memory, square root.

9v (PP3 battery).

Integrated circuit - General Instruments C689G, here date coded mid 1977.

Made in England.

1977.

Notice the large size of the LED digits, which are among the biggest used on a hand-held calculator. By this late date the cost of LEDs had fallen considerably and large digits were cheaply available. They are further enhanced by the magnifying lenses in front, a common feature. Compare the display on this Sinclair Enterprise with the Enterprise Programmable which has the usual size LED digits.

Sincalir Enterprise calculator without cover

Unusually, like it's stablemate, the Enterprise Programmable, the whole of the front cover unclips to replace the battery.
Inside Inside

With the keyboard removed, showing the larger than normal magnifying lens array in front of the LED digits.

The General Instruments C689G integrated circuit.
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© Text & photographs copyright Nigel Tout  2000-2008 except where noted otherwise.